unsigned mz_id, n;
int ret;
bool need_iova_contig_obj;
+ size_t max_alloc_size = SIZE_MAX;
ret = mempool_ops_alloc_once(mp);
if (ret != 0)
if (min_chunk_size == (size_t)mem_size)
mz_flags |= RTE_MEMZONE_IOVA_CONTIG;
- mz = rte_memzone_reserve_aligned(mz_name, mem_size,
+ /* Allocate a memzone, reducing size be 2 on failure */
+ do {
+ mz = rte_memzone_reserve_aligned(
+ mz_name, RTE_MIN((size_t)mem_size, max_alloc_size),
mp->socket_id, mz_flags, align);
- /* don't try reserving with 0 size if we were asked to reserve
- * IOVA-contiguous memory.
- */
- if (min_chunk_size < (size_t)mem_size && mz == NULL) {
- /* not enough memory, retry with the biggest zone we
- * have
+ /* don't try with a smaller size if we were asked to
+ * reserve IOVA-contiguous memory.
*/
- mz = rte_memzone_reserve_aligned(mz_name, 0,
- mp->socket_id, mz_flags, align);
- }
- if (mz == NULL) {
- ret = -rte_errno;
- goto fail;
- }
+ if (min_chunk_size >= (size_t)mem_size && mz == NULL) {
+ ret = -rte_errno;
+ goto fail;
+ }
- if (mz->len < min_chunk_size) {
- rte_memzone_free(mz);
- ret = -ENOMEM;
- goto fail;
- }
+ if (mz == NULL && rte_errno == ENOMEM) {
+ max_alloc_size = RTE_MIN(max_alloc_size,
+ (size_t)mem_size) / 2;
+ if (max_alloc_size < min_chunk_size) {
+ ret = -ENOMEM;
+ goto fail;
+ }
+ } else if (mz == NULL) {
+ ret = -rte_errno;
+ goto fail;
+ }
+ } while (mz == NULL);
if (need_iova_contig_obj)
iova = mz->iova;